diff options
| author | Keith Packard <keithp@keithp.com> | 2015-01-27 16:55:27 -0800 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2015-01-27 16:55:27 -0800 |
| commit | a95d6776dea86cdc4bdc3512505ba7e75365c127 (patch) | |
| tree | c43b3bb253b4f5367b0c6f669b2892e8fd828ed2 /src/stmf0/stm32f0.h | |
| parent | 79f3434013650fe4e3d76e5eb56a10000ee34249 (diff) | |
altos/stmf0: Add CRC driver
Sets up the stm32f0 CRC hardware, exposing inline functions to access
it. DMA access is possible, but usbtrng can't use that.
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'src/stmf0/stm32f0.h')
| -rw-r--r-- | src/stmf0/stm32f0.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/stmf0/stm32f0.h b/src/stmf0/stm32f0.h index 32864ced..ce8ca456 100644 --- a/src/stmf0/stm32f0.h +++ b/src/stmf0/stm32f0.h @@ -23,6 +23,7 @@ typedef volatile uint32_t vuint32_t; typedef volatile void * vvoid_t; typedef volatile uint16_t vuint16_t; +typedef volatile uint8_t vuint8_t; struct stm_gpio { vuint32_t moder; @@ -568,6 +569,37 @@ extern struct stm_pwr stm_pwr; #define STM_PWR_CSR_SBF (1) #define STM_PWR_CSR_WUF (0) +struct stm_crc { + union { + vuint32_t u32; + vuint16_t u16; + vuint8_t u8; + } dr; + vuint32_t idr; + vuint32_t cr; + uint32_t _0c; + + vuint32_t init; + vuint32_t pol; +}; + +extern struct stm_crc stm_crc; + +#define stm_crc (*((struct stm_crc *) 0x40023000)) + +#define STM_CRC_CR_REV_OUT 7 +#define STM_CRC_CR_REV_IN 5 +#define STM_CRC_CR_REV_IN_NONE 0 +#define STM_CRC_CR_REV_IN_BY_BYTE 1 +#define STM_CRC_CR_REV_IN_BY_HALF_WORD 2 +#define STM_CRC_CR_REV_IN_BY_WORD 3 +#define STM_CRC_CR_POLYSIZE 3 +#define STM_CRC_CR_POLYSIZE_32 0 +#define STM_CRC_CR_POLYSIZE_16 1 +#define STM_CRC_CR_POLYSIZE_8 2 +#define STM_CRC_CR_POLYSIZE_7 3 +#define STM_CRC_CR_RESET 0 + /* The SYSTICK starts at 0xe000e010 */ struct stm_systick { |